KR0132131B1 - Fluid compressor - Google Patents

Abstract

The present invention allows the contact portion and the inner conductor of the inner conductor contacting the inner circumferential surface of the outer cylinder to perform rolling motion to prevent abrasion and wear and tear of the contact portion, and at the same time, the outer body and the inner conductor are gradually discharged to the fluid discharge structure. Formed to reduce the cross-sectional area to achieve high compression efficiency, and to equip the counterweight with the counterweight to offset the unbalanced force caused by the rotation of the eccentric shaft and the rotation of the eccentric shaft. A fluid compressor configured to be reduced.

Description

Fluid compressor

1 is a cross-sectional view showing an embodiment of a fluid compressor according to the present invention.

2 is an exploded perspective view of the anti-rotation mechanism represented in FIG.

3 is a cross-sectional view showing the order in which the internal whole shown in FIG. 1 revolves in the outer cylinder.

4 is a partial cross-sectional view of another embodiment of the present invention.

5 is a cross-sectional view showing another embodiment of the present invention.

6 is a partial sectional view of a fluid compressor according to the prior art.

* Explanation of symbols for main parts of the drawings

10: sealed case 11: electric motor part

12 compression unit 13 stator

14: rotor 15: compression chamber

16: passage 17: outer cylinder

18: whole inside 19: blade

20: blade groove 21: spindle

22: eccentric shaft 23: counterweight

24: fluid inlet 25: fluid outlet

26 suction hole 27 fixed body

28: suction end 29: discharge end

30: rotation prevention mechanism 31: back pressure chamber

32: lubricating oil

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid compressor, and more particularly, to a fluid compressor configured to form a cross-sectional area of the outer cylinder and the inner conductor so that the cross-sectional area is gradually reduced and revolve the inner conductor in the outer cylinder to compress and transport the fluid.

As shown in FIG. 6, the fluid compressor according to the prior art is provided with a fixed body having a fluid suction passage 5 and a discharge passage 6 in a sealed case (not shown), and a cylindrical cylinder on the fixed body. (1) to be rotatable to install a cylindrical rotor (2) connected to the cylinder (1) and the drive pin (7) in the cylinder (1), wherein the cylindrical rotor (2) is a cylinder (1) Is connected to the shaft 8 located eccentrically from the center of the center and a spiral blade 3 is inserted into the outer circumferential surface of the cylindrical rotor 2 so that the pitch gradually decreases in the discharge port direction so that the cylinder 1 can be retracted. ) Rotated by the drive means, the cylindrical rotor (2) eccentrically positioned also rotates together by the drive pin (7) while the outer peripheral surface of the cylinder (1) and the inner peripheral surface of the cylindrical rotor (2) As shown in FIG. 3, the blades are in contact with each other at a specific portion (A). The rod 3 is retracted from the blade groove formed in the cylindrical rotor 2, and the fluid is in contact with the blade 3 and the specific portion A of the two rotors in the direction of the discharge passage 6 from the suction passage 5. It is compressed and conveyed while passing through the compression chamber 4 partitioned by.

However, since the fluid compressor changes only the pitch of the blade 3 toward the discharge port 6 side, thereby changing the size of the compression chambers 4 partitioned from each other, there is a limit in the compression efficiency of the fluid, so that the fluid has a predetermined pressure. In order to compress until there was a problem in that the cylindrical cylinder 1 and the rotor 2 should be formed long.

The present applicant has filed the patent application No. 93-24119 fluid compressor in order to solve the problem of the prior art described above. According to the present invention, the inner and outer rotating bodies are formed in a conical shape so that the cross-sectional area gradually decreases in the direction of the discharge port of the fluid, so that not only the pitch of the blade but also the cross-sectional area of the space between the inner and outer rotating bodies are gradually reduced toward the discharge port side. The change in the volume of the adjacent pressure chamber is increased so that the compression efficiency can be significantly improved.

However, the above-described prior art and the fluid compressor of the present invention, the outer rotor and the inner rotor and the inner rotor positioned eccentrically to be rotated at the same time, the rotation radius difference to the contact portion of the two rotors and the two rotors Due to the slight difference in the rotational speed of the roller, the sliding part of the contact part is insignificant and wear and abrasion occurs in the grooves of the blade, the outer cylinder and the inner rotor, which shortens the life of the fluid compressor and Problems such as leakage occur.

The present invention has been made in order to solve the above problems, the inner part of the inner cylinder contacting the inner surface of the outer cylinder and the inner nostril to make a rolling motion to prevent the wear and wear of the contact and at the same time the outer cylinder It is an object of the present invention to provide a fluid compressor in which a sieve and an internal current collector are gradually reduced in cross-sectional area toward a discharge port of a fluid to obtain high compression efficiency.

Another object of the present invention is to provide a fluid compressor that can reduce the vibration and noise of the main side generated due to the revolution of the inner cylinder eccentrically installed with the outer cylinder.

Another object of the present invention is to provide a fluid compressor that can further increase the compression efficiency by making the blade is in close contact with the inner peripheral surface of the outer cylinder.

The fluid compressor of the present invention for realizing the above object comprises: a sealed case having a fluid suction port and a fluid discharge port, an outer cylinder having a hollow part fixed in the sealed case and having a cross-sectional area gradually reduced in the direction of the fluid discharge port; It is installed in the hollow portion of the outer cylinder and is inserted into the eccentric shaft disposed eccentrically with the outer cylinder through a bearing so that a part of the outer peripheral surface is revolving in contact with the inner surface of the outer cylinder and the cross-sectional area gradually toward the fluid discharge port direction. An internal collector that is reduced, a main shaft connected to the eccentric shaft, a rotation preventing mechanism that prevents the internal current from rotating, and an outer circumferential surface of the internal current collector, the pitch of which is directed from the suction end to the discharge end A spiral groove gradually smaller, a blade made of an elastic material inserted into the groove, and the inner shaft It characterized by consisting of a counterweight to reduce the dynamic unbalance caused by revolution of the body.

In addition, a back pressure chamber is formed so that a specific blade groove and the back pressure chamber communicate with each other so that the high pressure fluid entering the back pressure chamber pushes the inner whole in a direction in which the cross section of the outer cylinder is reduced, so that the blade adheres well to the outer circumferential surface of the outer cylinder. It is configured to be.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The fluid compressor of the present invention shown in FIG. 1 is composed of an airtight case 10, a compression unit 12 installed in the sealed case 10, and an electric motor unit 11. A fluid suction port 24 and a fluid discharge port 25 are formed, and the electric motor part 11 includes a stator 13 fixed to an inner surface of the sealed case 10 and a rotor (not shown) inside the stator 13. 14, the main shaft 21 is fitted into the rotor (14).

The compression unit 12 is installed on the inner surface of the sealed case 10, the outer cylinder 17, the internal current collector 18, the main shaft 21, the eccentric shaft 22, the anti-rotation mechanism 30, the blade ( 19).

The outer cylinder body 17 is formed in a conical shape and is fixed to the fixed body 27 installed in the sealed case 10 so that one end having a large diameter is used as the suction end 28 of the compressor and the radius is near the suction end 28. Suction hole 26 is formed in the direction to suck the fluid. If necessary, the suction hole 26 may be omitted, and one end of a large diameter outer cylinder may be used as the suction part. In addition, one end of the outer cylinder 17 having a small diameter is used as the discharge end 29 of the compressor.

The inner current collector 18 has a conical shape having the same conical angle as the outer cylinder 17, and the outer peripheral surface has a spiral blade groove whose pitch gradually decreases from the suction end 28 to the discharge end 29 ( 20 is formed in a direction substantially perpendicular to the central axis of the internal current collector 18. The inner current collector 18 is installed in the hollow portion of the outer cylinder 17 and is fitted to the eccentric shaft 22 eccentrically disposed from the center of the outer cylinder 17, so that a part of the outer circumferential surface of the outer cylinder 17 In contact with the inner circumferential surface is to revolve. A hole is formed in the internal current collector 1 so that a bearing 22 'eccentric shaft 22 is installed, and a counterweight 23 is installed for reducing the mass of the idle portion and for dynamic balance of the main shaft 21. The space part is formed so that it may become. In addition, a back pressure chamber 31 is formed in the suction shortening of the internal current collector 18 so that the blade groove 20 'and the back pressure chamber 31 of the specific compression chamber communicate with the passage 16.

The main shaft 21 is rotated by the rotational force of the rotor 14 of the electric motor unit 11 is transmitted, the rotational force is transmitted to the eccentric shaft 22 fixed to one end of the main shaft 21. The main shaft 21 is fitted to a bearing 35 provided in a fixed body 27 'fixed to the sealed case 10, and counterweights 23 and 23' are attached to both ends thereof. In addition, a bearing 22 'is provided in order to reduce frictional force between the eccentric shaft 22 and the inner current collector 18, which are extended at one end of the main shaft 21 during rotation.

The anti-rotation mechanism 30 for preventing the internal current 18 from being rotated is installed between the fixed body 27 'and the internal current 18. A protruding piece 30b is formed on the outer circumferential surface of the anti-rotation mechanism 30 so as to fit into the cut-out groove 27'a formed in the fixed body 27 ', and to the cut-out portion 30a formed in the anti-rotation mechanism 30. A projecting piece 18a protruding from one side end of the internal current collector 18 is fitted.

The blade 19 is formed of an elastic material such as Teflon and the like is freely inserted into the blade groove 20 formed on the outer circumferential surface of the inner conductor 18 so that the outer surface is in contact with the inner circumferential surface of the outer cylinder 17. Therefore, the blade 19 divides the space formed between the inner circumferential surface of the outer cylinder 17 and the outer circumferential surface of the internal processing agent 18 into a plurality of compression chambers 15. The bottom of the sealed case 10 is filled with a lubrication oil 32 to be used to lubricate the rotating part of the compressor.

In addition, counterweights 23 and 23 'are provided at positions having a phase of 180 degrees and 0 degrees from the positions of the eccentric shaft 22 at both ends of the main shaft 21 to which the eccentric shaft 22 is spoken. The unbalanced force of the main shaft 21 due to the rotation of the shaft and the idle of the internal current collector 18 is canceled to reduce the vibration of the compressor and increase the efficiency of the compressor. Here, the counterweight 23 can also be provided only in the position which has a phase of 180 degrees from the position of an eccentric shaft as needed. The counterweight 23 has a main shaft portion in a direction in which the center line B of the eccentric shaft 22 is located from the center line A when the main shaft 21 rotates about the center line A. Since the load is greater than that in the opposite direction, the main shaft is positioned so that the heavy object is located in the opposite direction in which the center line B of the eccentric shaft 22 is located from the center line A of the main shaft 21 so as to cancel the difference in the load. It is inserted and fixed at the tip of 21).

4 shows another embodiment of the installation angle of a blade which is a component of the present invention. The installation angle X of the blade groove 200 shown in FIG. 4 is formed to be smaller than 90 ° from the central axis of the internal conductor 180 in a direction in which the cross-sectional area of the internal conductor is reduced, so that the blade 190 When the unbalanced force due to the pressure of the fluid acting perpendicularly to both sides of the blade pushes the tip 191 of the blade in the direction in which the entire cross-sectional area of the inner hole is enlarged, the outer circumferential surface of the blade is pressed against the inner circumferential surface of the outer cylinder 170 and compressed. It is configured to improve efficiency. That is, since the pressure of the fluid located on the left side (C) of the predetermined blade is greater than the pressure of the fluid on the right side (D), as shown in FIG. 4, the tip 191 of the blade pushes to the right to the inside of the outer cylinder. Make sure the blade is in close contact with the face.

Another embodiment of the present invention is illustrated in FIG. In the present invention illustrated in FIG. 5, the inner circumferential surface of the outer cylinder 300 and the outer circumferential surface of the inner current collector 310 are formed in a curved bell shape, and the compression chamber 320 is adjusted by adjusting the slope of the curve. ) Can be reduced in a more multi-directional direction from the fluid inlet 330 to the fluid discharge port 340. The operational effects of the invention configured as described above are as follows.

When the electric motor unit 11 is driven to operate the fluid compressor, the rotor 14 and the main shaft 21 integrally coupled with the rotor are rotated to allow the eccentric shaft 22 to crank. When the eccentric shaft 22 is cranked, the inner current collector 18 performs an orbital motion in a state where a part of the outer circumferential surface is in contact with the inner circumferential surface of the outer cylinder 17, as shown in FIG. By the 30, the internal current collector 18 is prevented from rotating.

When the internal current collector 18 revolves, the blade 19 also rotates along with the internal current collector 18 while the blades of the portion where the inner surface of the outer cylinder 17 and the outer circumferential surface of the internal current collector 18 approach each other ( 19 is pushed into the groove 20, the blade 19 of the distant portion is moved outward from the blade groove 20 by the self-elastic force.

In this manner, when the internal current collector 18 revolves, the fluid is sucked into the compression chamber 15 through the fluid suction port 24 and the suction hole 26. This fluid is sucked into the compression chamber located at the suction end 28 and the inner circumferential surface of the outer cylinder 17 and the inner current collector 18 toward the discharge end 29 as the inner current is rotated in the order shown in FIG. Is rotated along the compression chamber 15 formed with the outer circumferential surface thereof.

Along the compression chamber 15, which is divided into an internal current collector 18, an outer cylinder 17, and a blade 19, the fluid is transferred to the suction end 28 toward the discharge end 29 so that the pitch of the blade 19 is reduced. It is compressed while exhibiting an improved compression effect than the conventional compressor by the gradual reduction and the reduction of the cross-sectional area of the compression chamber 15 due to the shape of the outer cylinder 17 and the internal current collector 18. The compressed fluid passes through the fluid discharge port 25 and is transferred to the external device.

At this time. Since the internal current collector 18 is revolved while the rotation is prevented by the anti-rotation mechanism 30, the blade 19 does not slide on the inner surface of the outer cylinder 17 so that the blade 19 and the blade groove 20 ) Wear and tear can be reduced.

In addition, the fluid compressor of the present invention is a structural feature of the outer cylinder 17 and the internal current collector 18, the area of the blade side in contact with the compression chamber of the low compression than the blade side in contact with the compression chamber of the high compression is larger than the blade ( 19, the difference in the forces (fluid pressure × blade side area exposed to the compression chamber) applied to both sides of each side can be reduced, thereby reducing the axial unbalance force applied to the blades. The adhesion between 18) becomes good. Furthermore, since the counterweights 23 and 23 'are provided on the main shaft 21, the unbalanced force of the main shaft 21 due to the rotation of the eccentric shaft 22 and the revolving of the eccentric inner conductor 18 is canceled. Vibration is reduced and the efficiency of the compressor is increased.

That is, the center line A of the main shaft 21 coincides with the center line of the outer cylinder 17, and the center line B of the eccentric shaft 22 coincides with the center line of the internal current collector 18. Since the main shaft 21 is rotated about the center line A, the main shaft 21 is rotated and subjected to a large load in the direction of the center line B of the eccentric shaft 22, resulting in a dynamic imbalance. From A), the counterweight 23 in which the weight is located in the opposite direction in which the center line B of the eccentric shaft 22 is located is inserted and fixed to the tip of the main shaft 21, so that the dynamic balance is maintained while the main shaft 21 rotates. Will be maintained.

Further, the blade groove 20 'of the specific compression chamber and the back pressure chamber 31 communicate with the passage 16 so that the high pressure fluid entering the back pressure chamber 31 causes the inner cylinder 18 to pass through the outer cylinder 17. Since the cross-sectional area of the pressure is reduced in the direction in which the specific portion of the blade 19 and the internal current collector 18 is in close contact with the inner peripheral surface of the outer cylinder 17, the compression efficiency of the fluid is further improved.

As described above, the present invention not only greatly improves the compression efficiency of the compressor, but also reduces the wear and tear of the contact portion, thereby extending the service life of the compressor and maintaining the dynamic balance of the main shaft, thereby operating smoothly.

Claims (4)

A sealing case having a fluid intake port and a fluid discharge port, an outer cylinder body fixed in the closed case and gradually reduced in cross-sectional area in the direction of the fluid discharge port, and an eccentric shaft installed in the outer cylinder body and disposed eccentrically with the outer cylinder body; The inner whole is inserted into a state and a part of the outer circumferential surface is revolved in contact with the inner surface of the outer cylinder and the cross section is gradually reduced in the direction of the fluid discharge port, the main shaft connected to the eccentric shaft, and the inner whole is An anti-rotation mechanism for preventing rotation, a helical groove formed on the inner circumferential surface of the outer cylinder or the outer circumferential surface of the inner cylinder and gradually decreasing in pitch from the suction end to the discharge end, and elastically inserted into the groove. Blades made of material and dynamic unbalance caused by the rotation of the eccentric shaft and the revolution of the internal porosity Fluid compressor, characterized in that consisting of a counterweight to reduce. The anti-rotation mechanism of claim 1, wherein the anti-rotation mechanism is fixed to the sealed case and has a cutout groove formed on the outer surface of the protruding surface, and a protruding surface positioned between the fixed body and the internal collector and fitted into the cutout groove of the fixed body. And a member formed on the outer circumferential surface, the member having a recessed portion formed on one side thereof, and a protruding piece projecting to one end of the internal current collector and fitted to the recessed portion of the member. The fluid compressor according to claim 1, wherein a back pressure chamber is formed inside the inner cavity so that a groove of a specific braid communicates with the back pressure chamber. The fluid compressor according to claim 1, wherein the blade groove of the internal current collector is inclined at an angle smaller than 90 ° from the central axis of the internal current collector in a direction in which the cross-sectional area of the internal current material is reduced.